View LM317LBD_10422.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Order this document by LM317L/D
LM317L Three-Terminal Adjustable Output Positive Voltage Regulator
The LM317L is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 100 mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making them essentially blow-out proof. The LM317L serves a wide variety of applications including local, on card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317L can be used as a precision current regulator. * Output Current in Excess of 100 mA
LOW CURRENT THREE-TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR
SEMICONDUCTOR TECHNICAL DATA
Z SUFFIX PLASTIC PACKAGE CASE 29 Pin 1. Adjust 2. Vout 3. Vin
* * * * * * *
Output Adjustable Between 1.2 V and 37 V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe-Area Compensation Floating Operation for High Voltage Applications Standard 3-Lead Transistor Package Eliminates Stocking Many Fixed Voltages
1
2
3
D SUFFIX PLASTIC PACKAGE CASE 751 (SOP-8*)
8 1
Pin 1. 2. 3. 4. 5. 6. 7. 8.
Vin Vout Vout Adjust N.C. Vout Vout N.C.
Simplified Application
Vin Vout R1 240 IAdj Cin* 0.1F Adjust + C ** O 1.0F
LM317L
* SOP-8 is an internally modified SO-8 package. Pins 2, 3, 6 and 7 are electrically common to the die attach flag. This internal lead frame modification decreases package thermal resistance and increases power dissipation capability when appropriately mounted on a printed circuit board. SOP-8 conforms to all external dimensions of the standard SO-8 package.
R2
* Cin is required if regulator is located an appreciable ** distance from power supply filter. ** CO is not needed for stability, however, ** it does improve transient response. Vout
ORDERING INFORMATION
Device LM317LD LM317LZ LM317LBD LM317LBZ Operating Temperature Range TJ = 0 to +125C TJ = -40 to +125C Package SOP-8 Plastic SOP-8 Plastic
Rev 1
+ 1.25 V 1 ) R2 ) IAdj R2 R1
Since IAdj is controlled to less than 100 A, the error associated with this term is negligible in most applications.
(c) Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
LM317L
MAXIMUM RATINGS
Rating Input-Output Voltage Differential Power Dissipation Operating Junction Temperature Range Storage Temperature Range Symbol VI-VO PD TJ Tstg Value 40 Internally Limited -40 to +125 -65 to +150 Unit Vdc W C C
ELECTRICAL CHARACTERISTICS (VI-VO = 5.0 V; IO = 40 mA; TJ = Tlow to Thigh [Note 1]; Imax and Pmax [Note 2];
unless otherwise noted.) LM317L, LB Characteristics Line Regulation (Note 3) TA = 25C, 3.0 V VI - VO 40 V Load Regulation (Note 3), TA = 25C 10 mA IO Imax - LM317L VO 5.0 V VO 5.0 V Adjustment Pin Current Adjustment Pin Current Change 2.5 V VI - VO 40 V, PD Pmax 10 mA IO Imax - LM317L Reference Voltage 3.0 V VI - VO 40 V, PD Pmax 10 mA IO Imax - LM317L Line Regulation (Note 3) 3.0 V VI - VO 40 V Load Regulation (Note 3) 10 mA IO Imax - LM317L VO 5.0 V VO 5.0 V Temperature Stability (Tlow TJ Thigh) Minimum Load Current to Maintain Regulation (VI - VO = 40 V) Maximum Output Current VI - VO 6.25 V, PD Pmax, Z Package VI - VO 40 V, PD Pmax, TA = 25C, Z Package RMS Noise, % of VO TA = 25C, 10 Hz f 10 kHz Ripple Rejection (Note 4) VO = 1.2 V, f = 120 Hz CAdj = 10 F, VO = 10.0 V Long Term Stability, TJ = Thigh (Note 5) TA = 25C for Endpoint Measurements Thermal Resistance, Junction-to-Case Z Package Thermal Resistance, Junction-to-Air Z Package 4 Figure 1 2 Symbol Regline Regload - - 3 1, 2 IAdj IAdj - - 5.0 0.1 50 0.2 25 0.5 100 5.0 mV % VO A A Min - Typ 0.01 Max 0.04 Unit %/V
3
Vref
1.20
1.25
1.30
V
1 2
Regline Regload
-
0.02
0.07
%/V
- - 3 3 3 TS ILmin Imax 100 - N RR 60 - 3 S RJC RJA - - - - - -
20 0.3 0.7 3.5 200 20 0.003
70 1.5 - 10 - - -
mV % VO % VO mA mA
% VO dB
80 80 0.3 83 160
- - 1.0 - - %/1.0 k Hrs. C/W C/W
NOTES: 1. Tlow to Thigh = 0 to +125C for LM317L -40 to +125C for LM317LB 2. Imax = 100 mA Pmax = 625 mW 3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 4. CAdj, when used, is connected between the adjustment pin and ground. 5. Since Long-Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot.
2
MOTOROLA ANALOG IC DEVICE DATA
LM317L
Representative Schematic Diagram
Vin 300 300 300 3.0k 30 0 70 6.8V 6.8V 350 18k
8.67k 130 5.1k 200 k 180 180 2.0k 6.0k 10 pF 10 pF 60
500 40 0
6.3V
2.5
Vout 2.4k 12.8k 5 0
Adjust
Figure 1. Line Regulation and IAdj/Line Test Circuit
VCC Line Regulation (%/V) = * VIH VIL Vin Vout LM317L VOH - VOL x 100 VOL VOH VOL
Adjust Cin 0.1F IAdj
R1
240 1% CO
RL + 1F
* Pulse Testing Required: 1% Duty Cycle is suggested.
R2 1 %
MOTOROLA ANALOG IC DEVICE DATA
3
LM317L
Figure 2. Load Regulation and IAdj/Load Test Circuit
Load Regulation (mV) = VO (min Load) -VO (max Load) Load Regulation (% VO) = Vin* Vin Vout VO (min Load) - VO (max Load) VO (min Load) X 100 VO (min Load) VO (max Load)
LM317L
IL RL (max Load) * + CO 1.0F
Adjust Cin 0.1F IAdj
R1
240 1%
RL (min Load)
R2 1% * Pulse Testing Required: 1% Duty Cycle is suggested.
Figure 3. Standard Test Circuit
Vin Vout
LM317L
IL
Adjust R1 IAdj VI Cin 0.1F ISET R2 1%
240 1%
Vref + CO 1F
RL VO
Pulse Testing Required: 1% Duty Cycle is suggested.
To Calculate R2: Vout = ISET R2 + 1.250 V Assume ISET = 5.25 mA
Figure 4. Ripple Rejection Test Circuit
14.30V 4.30V f = 120 Hz Vin LM317L Vout Vout = 1.25 V
Adjust Cin 0.1F
R1
240 1%
D1 * 1N4002 + CO 1F
RL VO
R2
1.65K 1%
+ ** 10F
* D1 Discharges CAdj if Output is Shorted to Ground.
**CAdj provides an AC ground to the adjust pin.
4
MOTOROLA ANALOG IC DEVICE DATA
LM317L
Figure 5. Load Regulation
V out, OUTPUT VOLTAGE CHANGE (%) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C) 150 Vin = 10 V Vout = 5.0 V IL = 5.0 mA to 100 mA
Figure 6. Ripple Rejection
RR, RIPPLE REJECTION (dB)
Vin = 45 V Vout = 5.0 V IL = 5.0 mA to 40 mA
80
70 IL = 40 mA f = 120 Hz Vout = 10 V Vin = 14 V to 24 V
60
50 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C) 150
Figure 7. Current Limit
0.50 TJ = 25C IO, OUTPUT CURRENT (A) 0.40 0.30 0.20 0.10 0 TJ = 150C V in -Vout , INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) 2.5
Figure 8. Dropout Voltage
2.0 IL = 100 mA 1.5 IL = 5.0 mA 1.0
0
10 20 30 40 Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V)
50
0.5
-50
-25
0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C)
150
Figure 9. Minimum Operating Current
5.0 IB , QUIESCENT CURRENT (mA) 4.5 RR, RIPPLE REJECTION (dB) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 10 20 30 40 Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) TJ = 55C TJ = 25C TJ = 150C 100 90 80 70 60 50 40 30 20 10 10
Figure 10. Ripple Rejection versus Frequency
IL = 40 mA Vin = 5.0 V 1.0 VPP Vout = 1.25 V
100
1.0 k
10 k 100 k 1.0 M f, FREQUENCY (Hz)
MOTOROLA ANALOG IC DEVICE DATA
5
LM317L
Figure 11. Temperature Stability
1.260 IAdj, ADJUSTMENT PIN CURRENT ( A) V ref , REFERENCE VOLTAGE (V) 80 70 65 60 55 50 45 40 35 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C) 150 Vin = 6.25 V Vout = Vref IL = 10 mA IL = 100 mA
Figure 12. Adjustment Pin Current
1.250
1.240 Vin = 4.2 V Vout = Vref IL = 5.0 mA
1.230
1.220
-50
-25
0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C)
150
Figure 13. Line Regulation
Vout , OUTPUT VOLTAGE CHANGE (%) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C) 150 4.0 -50 -25 Vin = 4.25 V to 41.25 V Vout = Vref IL = 5 mA
Figure 14. Output Noise
NOISE VOLTAGE ( V)
10
Bandwidth 100 Hz to 10 kHz
8.0
6.0
0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C)
150
Vout , OUTPUT VOLTAGE DEVIATION (V)
Vout , OUTPUT VOLTAGE DEVIATION (V)
Figure 15. Line Transient Response
1.5 1.0 0.5 0 -0.5 -1.0 -1.5 1.0 0.5 0 0 10 20 t, TIME (s) Vin 30 40 Vout = 1.25 V IL = 20 mA TJ = 25C CL = 1 F
Figure 16. Load Transient Response
0.3 0.2 0.1 0 -0.1 -0.2 -0.3 100 50 0 0 10 20 t, TIME (s) IL 30 40 CL = 0.3 F; CAdj = 10 F Vin = 15 V Vout = 10 V INL = 50 mA TJ = 25C CL = 1 F; CAdj = 10 F
Vin , INPUT VOLTAGE CHANGE (V)
6
I L , LOAD CURRENT (mA)
CL = 0
MOTOROLA ANALOG IC DEVICE DATA
LM317L
APPLICATIONS INFORMATION
Basic Circuit Operation The LM317L is a 3-terminal floating regulator. In operation, the LM317L develops and maintains a nominal 1.25 V reference (Vref) between its output and adjustment terminals. This reference voltage is converted to a programming current (IPROG) by R1 (see Figure 13), and this constant current flows through R2 to ground. The regulated output voltage is given by: R2 Vout = Vref (1 + ) + IAdj R2 R1 Since the current from the adjustment terminal (IAdj) represents an error term in the equation, the LM317L was designed to control IAdj to less than 100 A and keep it constant. To do this, all quiescent operating current is returned to the output terminal. This imposes the requirement for a minimum load current. If the load current is less than this minimum, the output voltage will rise. Since the LM317L is a floating regulator, it is only the voltage differential across the circuit which is important to performance, and operation at high voltages with respect to ground is possible. Figure 17. Basic Circuit Configuration
Vin Vout LM317L + R1 Adjust Vref IPROG Vout IAdj R2
External Capacitors A 0.1 F disc or 1.0 F tantalum input bypass capacitor (Cin) is recommended to reduce the sensitivity to input line impedance. The adjustment terminal may be bypassed to ground to improve ripple rejection. This capacitor (CAdj) prevents ripple from being amplified as the output voltage is increased. A 10 F capacitor should improve ripple rejection about 15 dB at 120 Hz in a 10 V application. Although the LM317L is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can cause excessive ringing. An output capacitance (CO) in the form of a 1.0 F tantalum or 25 F aluminum electrolytic capacitor on the output swamps this effect and insures stability. Protection Diodes When external capacitors are used with any IC regulator it is sometimes necessary to add protection diodes to prevent the capacitors from discharging through low current points into the regulator. Figure 14 shows the LM317L with the recommended protection diodes for output voltages in excess of 25 V or high capacitance values (CO > 10 F, CAdj > 5.0 F). Diode D1 prevents CO from discharging thru the IC during an input short circuit. Diode D2 protects against capacitor CAdj discharging through the IC during an output short circuit. The combination of diodes D1 and D2 prevents CAdj from discharging through the IC during an input short circuit.
Figure 18. Voltage Regulator with Protection Diodes
D1 1N4002 Vin LM317L Vout + Cin Adjust R2 R1 D2 CO
Vref = 1.25 V Typical
Load Regulation The LM317L is capable of providing extremely good load regulation, but a few precautions are needed to obtain maximum performance. For best performance, the programming resistor (R1) should be connected as close to the regulator as possible to minimize line drops which effectively appear in series with the reference, thereby degrading regulation. The ground end of R2 can be returned near the load ground to provide remote ground sensing and improve load regulation.
1N4002 CAdj
MOTOROLA ANALOG IC DEVICE DATA
7
LM317L
Figure 19. Adjustable Current Limiter
Vout R1 1.25k Vin Adjust * To provide current limiting of IO to the system ground, the source of the current limiting diode must be tied to a negative voltage below - 7.25 V. R2 Vref IDSS R2 500 D1 1N914 D2 1N914 LM317L + 120 Adjust MPS2222 720 1N5314 1.0k TTL Control 1.0F VO IO
Figure 20. 5 V Electronic Shutdown Regulator
D1 1N4002 Vout
+25V Vin
LM317L
Vref R1 = IOmax + IDSS VO < POV + 1.25 V + VSS ILmin - IP < IO < 100 mA - IP As shown O < IO < 95 mA
VSS*
Minimum Vout = 1.25 V
D1 protects the device during an input short circuit.
Figure 21. Slow Turn-On Regulator
Figure 22. Current Regulator
Iout
Vin LM317L
Vout 240 Adjust R2 MPS2907 50k + 10F 1N4002
Vin LM317L
R1 Vout Adjust IAdj
R2
Ioutmax =
Vref R1 Vref R1 + R2
+ IAdj
^ 1.251 V R
V ^ R1.25R2 1+
Ioutmax =
+ IAdj
5.0 mA < Iout < 100 mA
8
MOTOROLA ANALOG IC DEVICE DATA
LM317L
OUTLINE DIMENSIONS
Z SUFFIX PLASTIC PACKAGE CASE 29-04 ISSUE AD A R P
SEATING PLANE
B
F
L K
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. DIMENSION F APPLIES BETWEEN P AND L. DIMENSION D AND J APPLY BETWEEN L AND K MINIMUM. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. DIM A B C D F G H J K L N P R V INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.022 0.016 0.019 0.045 0.055 0.095 0.105 0.015 0.020 0.500 --- 0.250 --- 0.080 0.105 --- 0.100 0.115 --- 0.135 --- MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.41 0.55 0.41 0.48 1.15 1.39 2.42 2.66 0.39 0.50 12.70 --- 6.35 --- 2.04 2.66 --- 2.54 2.93 --- 3.43 ---
XX G H V
1
D J C SECTION X-X N N
D SUFFIX PLASTIC PACKAGE CASE 751-05 (SOP-8) ISSUE R
A
8
D
5
C
E
1 4
H
0.25
M
B
M
h B C e A
SEATING PLANE
X 45 _
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. DIMENSIONS ARE IN MILLIMETERS. 3. DIMENSION D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE MOLD PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS OF THE B DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A A1 B C D E e H h L MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.18 0.25 4.80 5.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.40 1.25 0_ 7_
q
L 0.10 A1 0.25 B
M
CB
S
A
S
q
MOTOROLA ANALOG IC DEVICE DATA
9
LM317L
NOTES
10
MOTOROLA ANALOG IC DEVICE DATA
LM317L
NOTES
MOTOROLA ANALOG IC DEVICE DATA
11
LM317L
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1-800-441-2447 or 602-303-5454 MFAX: RMFAX0@email.sps.mot.com - TOUCHTONE 602-244-6609 INTERNET: http://Design-NET.com
JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-81-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298
12
MOTOROLA ANALOG IC DEVICE DATA LM317L/D
*LM317L/D*

▲Up To Search▲

Price & Availability of LM317LBD

	To Download LM317LBD Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .